package com.bdqn.service;

import com.bdqn.common.SendEMailException;
import com.bdqn.mapper.SysUserMapper;
import com.bdqn.pojo.SysUser;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Propagation;
import org.springframework.transaction.annotation.Transactional;

import java.util.List;

/**
* SysUserService服务层实现类
*/
@Transactional
@Service("sysUserService")
public class SysUserServiceImpl implements SysUserService {

    @Autowired // @Resource // 使用注解的方式将DAO层的Bean注入
    private SysUserMapper sysUserMapper;

    /**
     * 获得用户列表
     *
     * @param sysUser
     * @return
     */
    @Transactional(propagation = Propagation.SUPPORTS)
    @Override
    public List<SysUser> getList(SysUser sysUser) {
        return sysUserMapper.selectSysUserList(sysUser);
    }

    /**
     * 保存用户
     *
     * @param sysUser
     * @return
     */
    @Transactional(propagation = Propagation.REQUIRED)
    @Override
    public boolean add(SysUser sysUser) throws SendEMailException {
        // 模拟在一个事务中两次对数据库的操作，第一次操作完成之后发生异常时，第二次未操作未执行，第一次操作也将回滚。两次操作要么都不成功，要么同时成功
        sysUserMapper.add(sysUser);
        // int num = 5 / 0; // 模拟程序中抛出异常
        /*if (sysUser != null) {
            // 手动抛出异常
            throw new SendEMailException("发送通知邮件异常");
        }*/
        sysUserMapper.add(sysUser);
        return true;
    }
}
